JAVA SE Serial Port Send DATA

package com.reapptech.creapptos;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import jssc.SerialPort;
import jssc.SerialPortEvent;
import jssc.SerialPortEventListener;
import jssc.SerialPortException;

/**
 * Hello world!
 *
 */
public class App
{
    // The serial port.
    private static SerialPort serialPort;

    /**
     * @param args
     */
    public static void main( String[] args )
    {
        // getting serial ports list into the array
//        String[] portNames = SerialPortList.getPortNames();
//
//        if(portNames.length == 0) {
//          System.out.println("There are no serial ports : (Use an emulator such as VSPE, to "
//                  + "create a virtual serial port.");
//          System.out.println("Press Enter to exit...");
//
//          try {
//              System.in.read();
//          }catch(IOException ioe) {
//              ioe.printStackTrace();
//          }
//          return;
//        }
//
//        for(int i = 0; i < portNames.length; i++) {
//          System.out.println(portNames[i]);
//        }

        // Now read and write.
        SerialPort serialPort = new SerialPort("COM15");

        try {

            serialPort.openPort();

            serialPort.setParams( SerialPort.BAUDRATE_115200,
                                  SerialPort.DATABITS_8,
                                  SerialPort.STOPBITS_1,
                                  SerialPort.PARITY_NONE);

            serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);


            serialPort.addEventListener(new PortReader(), SerialPort.MASK_RXCHAR);

            Path path = Paths.get("C:\\Users\\shango\\Desktop\\data_20191125.csv");

             try {
                    byte[] bArray = Files.readAllBytes(path);
                    // reading content from byte array
                    for (int i = 0; i < bArray.length; i++){
                          serialPort.writeByte(bArray[i]);
                    }

                    System.out.println("Message sent.");
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        } catch (SerialPortException se) {
            System.out.println("There are errors writing to this port: " + se);
        }finally {
            try {
                serialPort.closePort();
            } catch (SerialPortException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    private static class PortReader implements SerialPortEventListener{

        public void serialEvent(SerialPortEvent event) {
            if(event.isRXCHAR() && event.getEventValue() > 0) {
                try {
                    String recData = serialPort.readString(event.getEventValue());
                    System.out.println("Received response: " + recData);

                }catch(SerialPortException e) {
                    System.out.println("Error in receiving string from COM-port: " + e);
                }
            }

        }

    }
}